Perhaps you should try some spelling variations:
truc ban » thuc ban, truc dan, truc van
thanh ve » hanh ve, thanh va, thanh vien
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
y lang » o lang, tay lang, yen lang
_ lang » o lang, _ land
va cau » van cau, va cac, va dau
ve cua » le cua, de cua, te cua

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y lang) OR (_ lang)) xa hoi. hieu va cau ((truc ban) OR (truc va)) thanh ve cua vat~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y lang) OR (_ lang)) xa hoi. hieu va cau ((truc ban) or (truc va)) thanh ve cua vat~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((y lang) OR (_ lang)) xa hoi. hieu va cau ((truc ban) or (truc va)) thanh ve cua vat*.